1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe663c7155d09643c0ad4223a10be26d2ebef5c5c894409376f81fabf7732d78e. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c2e809-bfef-4bfd-be94-1629056c0410.json and https://artists.proofprofile.net/proofs/artist/b8c2e809-bfef-4bfd-be94-1629056c0410.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545986674e0ecebd99df9969441afe0c1159c79a95f4c6eb27c4b77d10ea48c. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1443222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea850f2d526e1725fff9e4e0ebb0603e9e0edd358451857ff248c60c0dd46bef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1444858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08280e5d1e11d092a4c34f4103b3c307802d50fb5cc3a6d043feafa4735db855. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1444756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389673ac4139f50e5c43eb178d231dfb9abb0ffd5172ae45f2550956cd223f1f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1446211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0418e845a9a6f62c1c4faf9a7876965d76f2556a313daa0db0cf6cfa66081. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1446101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c02169d7ac2ccc018767c8f330883dcceb666503e6deba6437092a0ba145c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1449071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6837a6211feaaf147ada2d3403367b2bad7a2c670903ed0722ff48fe74922fc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1448653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd058c2f0d5179d4b0a54c2174d7a459e108229df88009394146bf9840d26c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1444859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b2749d0240d23ef3c44f07979fe6e6df784fef58ff84bda90901d7242e0b33. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1444753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c02169d7ac2ccc018767c8f330883dcceb666503e6deba6437092a0ba145c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1449071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0418e845a9a6f62c1c4faf9a7876965d76f2556a313daa0db0cf6cfa66081. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1446101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea850f2d526e1725fff9e4e0ebb0603e9e0edd358451857ff248c60c0dd46bef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1444858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73da217730ade3c67cb19fd7b48bd88038b3bcab322c97baba143dacd6c7219. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1447983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2cda073a6b4ff0f2a44a878e350be08d473495d9ff02044d89f99b6346579f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1448357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6837a6211feaaf147ada2d3403367b2bad7a2c670903ed0722ff48fe74922fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1448653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9050da9f4b00f8e51def2a530b1af2d15402cfaae9b12433ee4997b951bd879c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1449944.